hadoop 文件夹文件的创建与删除
package hadoop.test;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
public class FileSystemTest {
public static void main(String[] args) throws IOException, URISyntaxException {
Configuration cfg = new Configuration();
FileSystem fs = FileSystem.get(new URI("hdfs://data1:9000"),cfg);
//fs.open(new Path(new URI("hdfs://data1:9000")));
boolean flgs = fs.exists(new Path(new URI("/hgs")));
if(flgs) {
boolean flg = fs.isDirectory(new Path(new URI("/hgs")));
System.out.println(flg);
//这里会报错，添加 环境变量 HADOOP_USER_NAME=root
//从本地copy一个文件到hdfs
//fs.copyFromLocalFile(true,new Path("e:\\install.ini"), new Path("/hgs/tmp.txt"));
//拷贝hdfs文件到本地
//fs.copyToLocalFile(false,new Path("hdfs://data1:9000/hgs/tmp.txt"),new Path("e:\\tmp.txt"),true );
//创建文件夹
//boolean fl = fs.mkdirs(new Path("/hgs/hgstmp"));
//System.out.println(fl);
boolean f = fs.delete(new Path("/hgs/hgstmp"), true);
System.out.println(f);
}
System.out.println(flgs);
fs.close();
}
}
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/31506529/viewspace-2217164/ ，如需转载，请注明出处，否则将追究法律责任。
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